kubernetes/pkg/controller/podautoscaler/metrics/utilization.go

// GetResourceUtilizationRatio takes in a set of metrics, a set of matching requests,
// and a target utilization percentage, and calculates the ratio of
// desired to actual utilization (returning that, the actual utilization, and the raw average value)
func GetResourceUtilizationRatio(metrics PodMetricsInfo, requests map[string]int64, targetUtilization int32) (utilizationRatio float64, currentUtilization int32, rawAverageValue int64, err error) { … }

// GetMetricUsageRatio takes in a set of metrics and a target usage value,
// and calculates the ratio of desired to actual usage
// (returning that and the actual usage)
func GetMetricUsageRatio(metrics PodMetricsInfo, targetUsage int64) (usageRatio float64, currentUsage int64) { … }